Comparative study on effects of injection mode on combustion and emission characteristics of a combined injection n-butanol/gasoline SI engine with hydrogen direct injection

Zhen Shang, Xiumin Yu, Lei Ren, Guowu Wei, Guanting Li, Decheng Li and Yinan Li

Energy, 2020, vol. 213, issue C

Abstract: In this paper, on the basis of combined injection technique, three injection modes with five n-butanol/gasoline volume ratios (νN) were put forward, aiming to compare and evaluate the relationship between the injection mode and the combustion and emission characteristics of an n-butanol/gasoline SI engine equipped with an extra hydrogen direct injection system. The results indicated that under low load condition, compared with NGP (n-butanol/gasoline port injection) mode, the NGPD (n-butanol/gasoline combined injection) mode and NGPH (n-butanol/gasoline with hydrogen combined injection) mode can both improve the combustion performance. The peak cylinder pressure of NGPD and NGPH mode was 5.58% and 11.63% higher than that of NGP mode on average, respectively. Furthermore, the combined injection modes concentrated the process of heat release, shortened the combustion duration, increased the power performance and improved the combustion stability at all νN. As for emissions, the NGPD and NGPH combined modes significantly decreased the HC and CO emissions, but increased the NOX emissions. Among all the test conditions, the NGPH mode with 25% νN obtained the best combustion quality. Additionally, the effect rules of νN on combustion and emission characteristics under NGP mode were found to be consistent with those under NGPD and NGPH combined modes.

Keywords: N-Butanol/gasoline blends; N-butanol volume ratio; Hydrogen direct injection; Combined injection; Combustion and emission (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:213:y:2020:i:c:s0360544220320107

DOI: 10.1016/j.energy.2020.118903

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